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Energy-Constrained Design of Joint NOMA-Diversity Schemes with Imperfect Interference Cancellation
Fulvio Babich1, Giulia Buttazzoni1, Francesca Vatta1
1Department of Engineering and Architecture, University of Trieste, Via A. Valerio 10, 34127 Trieste, Italy.
Sensors (Basel, Switzerland)
|July 2, 2021
Summary
This study introduces new random access protocols combining Packet Repetition (PR) with Non-Orthogonal Multiple Access (NOMA). The research focuses on energy-limited scenarios crucial for Internet of Things (IoT) in 5G systems.
Area of Science:
- Wireless communication
- Information theory
- Telecommunications engineering
Background:
- Non-Orthogonal Multiple Access (NOMA) and Packet Repetition (PR) schemes like CRDSA and IRSA are key for efficient wireless systems.
- Existing NOMA/PR protocols often overlook practical energy constraints and interference.
- The Internet of Things (IoT) and 5G systems demand highly energy-efficient communication protocols.
Purpose of the Study:
- To propose novel random access protocols integrating NOMA with PR schemes (CRDSA, IRSA).
- To analytically derive energy levels considering imperfect Interference Cancellation (IC) and power requirements.
- To evaluate the performance of these protocols in energy-constrained scenarios relevant for IoT and 5G.
Main Methods:
- Analytical derivation of energy levels incorporating residual interference and transmission power constraints.
- Development of a theoretical model using the density evolution method.
- Numerical validation through extensive simulations to assess throughput and performance.
Main Results:
- The study provides a framework for analyzing NOMA/PR schemes under realistic energy limitations.
- It quantifies the impact of imperfect IC on achievable energy levels.
- Performance evaluation reveals the effectiveness of proposed schemes in energy-constrained environments.
Conclusions:
- The proposed NOMA/PR protocols offer a viable solution for energy-efficient communication in IoT and 5G.
- Analytical models and simulations confirm the importance of considering energy constraints and imperfect IC.
- This research contributes to the advancement of wireless communication protocols for future networks.
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